Step drill bit Yato YT-44747 3 cm diameter 1 pc

The Yato YT-44747 step drill bit with a 3 cm diameter is a single-piece cutting tool designed for progressive hole enlargement in sheet materials and thin metals. Built for use with standard drill chucks, the stepped geometry allows drilling multiple hole sizes with one tool, reducing tool changes and setup time. The bit’s fluted steps provide controlled chip evacuation and smoother entry, enabling consistent hole shapes and sizes.

Advantages

This step drill bit offers a compact solution for sequential hole cutting, combining multiple diameters in a single tool to improve workflow efficiency. Its stepped profile reduces the need for pilot holes and simplifies deburring. The single-piece construction delivers stable performance during drilling, while the ground cutting edges contribute to accurate hole diameters and repeatability across similar tasks.

Suitable for

• Enlarging or creating holes in sheet metal and thin plate
• Electrical and HVAC installations requiring multiple conduit or knockout sizes
• Work in workshops and maintenance settings where quick size changes are needed
• Plastic and thin non-ferrous materials where progressive cutting is advantageous

Key specifications

• Tool type: step drill bit for progressive hole sizing
• Maximum diameter: 30 mm
• Number of pieces: 1
• Compatibility: designed for use in standard drill chucks and portable drills
• Typical materials: sheet metal, thin plates, plastics, non-ferrous metals

How to use

Secure the step drill bit in a properly rated drill chuck and set the drill to an appropriate speed for the workpiece material. Mark the center of the intended hole and position the pilot tip (if present) at the mark before starting. Apply steady, moderate feed pressure and allow the bit’s steps to cut progressively; reduce speed when approaching larger diameters or thicker material to maintain control. Retract periodically if chips build up, and use cutting fluid for metal applications to extend tool life and improve finish.

Usage recommendations

Use personal protective equipment, including safety glasses and gloves. For cleaner holes and longer tool life on metal, apply a suitable cutting lubricant and avoid excessive heat by using moderate speeds and intermittent pulling to clear chips. Match drill speed to material thickness and hardness: higher speeds for thin plastics, lower speeds for thicker or harder metals.